Broan PCMMP3 Zoning System Installation guide

Brand: Broan

Model: PCMMP3 Zoning System

Type: Installation guide

Model PCMMP3

™

PCMMP3 ZONING SYSTEM

3 Zones For Plug-In Damper Motors

PCMMP3

ZONING SYSTEM - 3 Zones

Features

Table of Contents

Installation ……………………………………….….…2-3

Operation …………………………………………..…….3

HVAC Equipment Set-Up…………..…………..……….3

Checkout..………………………………………...………3

Wiring ………………………………………………..…3-4

Troubleshooting ………………………………….……4-5

INSTALLATION

The PCMMP3 Plug-In Damper Zoning System-3, Model MMP3, is a

two (2) and three (3) zone control panel for single stage heating

only, cooling only or heating and cooling. The PCMMP3 can control

any single stage gas-oil-electric furnace, hydro-air heating and air

conditioning. The PCMMP3 panel is the central control panel where

all zone dampers, zone thermostats, HVAC Equipment and power

transformer are wired.

When installing the PCMMP3 panel it is important to pick a central

location where it is most convenient to bring all the wires. Most often

this is near the furnace or air handler and closest to power, the

HVAC unit controls and the zone dampers when typically located at

or near the plenum.

The PCMMP3 case and cover are made of sturdy ABS plastic and

can be mounted to any flat surface. It is recommended that the

panel be mounted to a wall or return plenum and NOT on the

furnace or plenum where it will be in contact with the high heating

temperatures. The panel can be located in an attic space or in an

enclosed cabinet of a rooftop unit, provided the panel enclosed and

not in direct exposure to the elements.

The cover easily removes from the case by pulling firmly and

separating the cover from the case exposing the circuit board.

There are 4 key-hole mounting points in each corner of the case.

The case has openings in the rear of the case as well as the side for

all wiring. Wiring can come from the back as well as the side in order

to make a neat installation.

OPERATION

The PCMMP3 controls single stage heating and cooling HVAC

Equipment. The PCMMP3 is compatible with any standard single

stage thermostat and setback thermostats as well. The PCMMP3

has various features that make installation and checkout very simple

for all of the board’s functionality.

The PCMMP3’s basic function is zone control. On a call for heating

or cooling, the panel will accept the first call from any zone. Upon

accepting this call the PCMMP3 will keep open the damper(s) to the

zone calling, close the damper(s) to those zones not calling, activate

the needed HVAC controls for heating or cooling, whichever is being

called and not accept any calls for the opposite mode.

Any calls for the opposite mode will be locked out until the initial

mode is either satisfied or a period of time has elapsed that is

sufficient for the first mode to satisfy, a maximum of 20 minutes. A

Patent Pending sequence determines the time the unit has been

running or needs to continue to run in order to adequately provide

conditioning for each mode. If a particular mode has already been

calling for 20 minutes or longer and an opposite call comes in the

PCMMP3 will immediately drop the mode, enter the purge mode in

order to dissipate the conditioned air into the zones calling before

switching over to provide the new conditioning call to its zones.

PURGE TIME

Once a call is satisfied the PCMMP3 drops the call for the heating or

cooling unit controls, whichever was calling and hold the damper(s)

to the zone(s) that were last calling during the Purge Mode. The

Purge mode is nominally 2 minutes and allows the excess

conditioned air in the plenum to be distributed only to the zone(s)

that were last calling. This eliminates the problem of overshooting

the temperature in the satisfied zones.

During the Purge mode the panel can be set to keep the Fan

running during Purge or to let the fan control in the HVAC unit to

control the fan. By using the FIPG (Fan On-In Purge) jumper, on the

top right corner of the control panel, this keeps the fan running until

the Purge mode is over. This mode avoids the fan shutting off during

the Purge mode and coming back on when another zone may be on

constant fan after the Purge Mode is over. This may be more often

used in commercial applications for continuous air circulation (CAC).

In residential applications the fan remaining on, especially in

heating, may be drafty and objectionable.

Once all zone thermostats are satisfied for heating and cooling, the

PCMMP3 can now accept Fan calls allowing Continuous Air

Circulation(CAC) in those zones where the thermostat’s Fan Switch

is set to ON. These zone dampers will be OPEN while the dampers

to the zones where the Fan Switch is set to AUTO will be CLOSED.

When all zone thermostats are satisfied for both Heating and

Cooling, and all Fan switches are set to AUTO position, the HVAC

unit will be off and all zone dampers will return to a normally open

position. Once a zone calls for heating, cooling or fan, the dampers

to the calling zones remain open and the dampers to the zones not

calling will close.

HVAC Equipment Set-Up

The PCMMP3 is factory set for conventional fossil fuel (oil or gas)

single stage heating and cooling. The panel only needs to be

configured when using with a conventional electric furnace or hydro-

air system in order to bring the fan on with a call for heat.

By using the FIH (Fan On-In Heat) jumper, located on the upper

right corner of the board, this allows the Fan to be activated with a

call for heat. Once the heat call is satisfied the fan will shut off as

well, as long as the FIPG jumper is off as well.

Other jumpers on the panel are for NO SENSOR and LOW LIMIT.

The NO SENSOR jumper must be on to jumper the pins when no

sensor is used. The LOW LIMIT jumper is OFF for a Heating limit of

170°F and ON for a higher heating limit temperature 180°F.

CHANGEOVER TIMER

Whenever a call is made for either heating or cooling, the

changeover timer is activated in order to track the amount of time

heating or cooling is on. When an opposite call is made after a first

call is existing the changeover timer calculates the amount of time

the unit has already been supplying the first mode in order to

determine how long it will hold off the opposite call. If an opposite

call is made shortly after the first call, the opposite call may be held

off for as much as 20 minutes. If the first call or subsequent calls for

the first call mode has had that mode operating for up to 20 minutes

already and an opposite call comes in after 20 minutes, the

changeover timer will immediately recognize the opposite call,

shutting off the current mode, enter the purge mode and

automatically switch to the opposite mode.

The longer a call has been running up to 20 minutes, the shorter the

wait time will be for an opposite call. If a call is over 20 minutes and

an opposite call is made the changeover will be immediate following

the purge time. This intelligent changeover timing makes the

PCMMP3 unique to any other zoning system.

CHECKOUT

The PCMMP3 has unique features that simplify the checkout of the

system and has LED readouts that constantly indicate the system

operation. Once 24 Volt Power is applied to the panel the Green

Power LED will illuminate. This will stay illuminated constantly when

power is applied.

The System LED will provide several different indications based

upon color and if it is flashing.

Heat ON – RED

Heat Over limit – RED Flashing

Cool ON – GREEN

Cool Over limit – Green Flashing

FAN ON – AMBER

PURGE

– AMBER Flashing

Each zone has its own small Green indicator LED next to each zone

relay. This light is lit whenever the zone damper is to be open, either

on a call or when all zones are satisfied.

WIRING

The PCMMP3 is very simple to wire and requires only a minimum

number of connections. The PCMMP3 terminal blocks are screw-

less and all wires can easily be pushed into their respective terminal

by de-pressing the button for each point and releasing once the wire

is seated. To remove the wire, just press its button again and

remove the wire.

Zone Dampers – The PCMMP3 powers only the 12VDC plug-in

dampers. Each damper comes with a modular cord and plugs

(RJ11) already installed to allow each zone damper to just plug into

the PCMMP3 panel. Additional dampers can be slaved to one

another by using the splitter included with each damper. Additional

dampers are connected via each splitter to “daisy chain’ from one

damper to the next. A maximum of 10 dampers per zone is

recommended.

Upon installation it is recommended that as each motor is connected

that each motor is cycled, before connecting the next motor, to

insure proper operation of that motor and to minimize

troubleshooting looking for a possible bad motor or wire connection.

Zone Thermostats – The thermostats wiring will for single stage

can be four or five wire. The fifth wire being the C-Common terminal

for 24 Volt powered thermostats. There are 5 terminals on the

PCMMP3 for each thermostat, marked Y-G-R-W-C. This wiring is

shown on Wiring Diagram 1 for single stage thermostats.

HVAC Equipment – The HVAC equipment will follow Wiring

Diagram 2 for Single Stage Systems. The PCMMP3 can also control

Heating Only and Cooling Only as well as both Heating and Cooling.

Transformer – A separate 24 Volt AC, 40VA Transformer is

recommended to power the control panel and dampers. Often the

transformer on the HVAC unit only has enough power for its own

controls. Therefore it is recommended a separate transformer be

used to power this panel and the dampers wired to it.

Transformer Wiring

24V TRANS

T24 -24V 40VA

TRANSFORMER

Zone Thermostat Wiring

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

Plug-In Damper Wiring

To Additional Dampers

Up to 10 Per Zone, if used.

Zone Damper

Connector on

Zone Panel

NOTE: It does NOT matter which jack on damper

goes to the panel or additional dampers.

PLUG-IN ZONE DAMPER

25 Foot Modular Cord

(Provided with each damper)

HVAC Equipment Wiring

Y COMPRESSOR RELAY

G FAN RELAY

W HEAT RELAY

R 24V. TRANSFORMER C

FURNACE CONTROLS

OUTDOOR CONDENSING UNIT

EQUIPMENT

Zone Plenum Sensor

The Zone Mix-Air Sensor, Model PCZPS, is a remote sensor that is

located in the supply air duct to sense the leaving air temperature of

the HVAC Unit. The PCZPS is a high limit protection for the heating

and a low limit protection for the cooling. When zoning, the airflow

through the HVAC Unit is critical. The LAS protects the equipment in

low air flow situations as well as when by-pass air is being directed

back into the return air duct.

The heating limit is fixed at 180nF. The cooling limit is fixed at 40nF.

When the PCZPS senses heating above its set point, or cooling

below its set point, the PCMMP3 will drop both stages of heating or

cooling. The PCZPS must sense a 10nF fall for heating or rise for

cooling before re-activating the first stages of heating or cooling. If

two stage heating or cooling is being used the second stage timer

will start again once the first stage is re-activated.

The PCZPS requires 2 wires from the sensor to the LAT terminals

on the PCMMP3 panel. The PCZPS probe can also be adjusted for

length by loosening the end nut and sliding the probe thru the

mounting plate in order for the probe to pass through any duct

insulation.

Leaving Air Sensor

(Mounted in Supply Air before Zone Dampers)

Model ZPS

LAS Terminals

On Zone Panel

NOTE: If the PCZPS is not used, the NO SENSOR jumper

located just above the LAT terminals must be on the pins.

After installing the PCZPS, use the chart supplied with the PCZPS to

check the Ohm reading for the appropriate duct temperature.

TROUBLESHOOTING

The PCMMP3 is a very simple control to troubleshoot, especially

with the LED indicators. The only other device needed is a simple

Volt/Ohm meter.

Almost all problems can be traced to an external component or

wiring to the PCMMP3. While the PCMMP3 has been designed to

operate under extreme voltage conditions and is fuse protected, like

any computer the micro-processor can hang up and not operate

properly. For these instances a BOOT button has been installed that

re-boots the micro-processor just like your computer. Pressing this

button for a few seconds and then release it will allow the micro-

processor to re-boot and in most all cases eliminate the problem. If

not the following procedure can help isolate the problem.

If the BOOT Button does not resolve the problem, turn off the power

to the panel for several seconds until the LEDs got out and then turn

the power back on to see if the panel resets. In many instances this

resolves the problem.

The first check is for 24VAC Power to the panel. When there is

power the Green Power LED will be lit. If not check the transformer

and the power supply to it.

BOOT

Zone(s) Not Calling

Each zone has a Green LED next to the zone relay when it is

calling. The LED being lit shows that the call is being recognized by

the PCMMP3. If a zone is supposed to be calling and the Zone LED

is not on, check for 24VAC across the thermostat terminal C and the

Y, if a Cool call, W if a Heat Call, or G if a Fan call. If there is no

voltage here at the panel the panel is not getting the signal from the

thermostat. The problem is mis-wiring, a broken wire or a problem in

the thermostat. To check the zone on the panel, place jumper from

R to Y to simulate a Cool call, R to W to simulate a Heat call, or R to

G to simulate a Fan call. By jumpering these terminals the zone call

LED will activate.

Zone(s) Will Not Shut Off

If a zone will not stop calling, the Zone LED should still be on.

Depending on the call disconnect the Y, W or G wire from the zone

terminal strip on the panel. The call from that zone will drop out

when the thermostat wire is removed. Check the thermostat wiring

for a mis-wiring or short that keeps the zone calling.

If the thermostat wire is disconnected from the proper terminal on

the zone and the zone LED remains lit, re-boot the panel to see if

the call drops. If the call still stays on, turn power off to the panel for

10 seconds and then turn back on. Once powered is restored and

the thermostat is disconnected the call should drop from the zone. If

not replace panel.

Damper Motor Checkout Procedure

In order to determine the operation of the damper motors, the panel

motor plug can be checked to determine if power is being supplied

from the panel. If there is power at the motor plug, the problem may

be a broken wire or poor connection in the cord or the motor itself.

To check the power to the motor from the damper plug on the panel,

switch your meter to DC Volts. Note the wires on the plug and check

across either Positive and Negative wires. Note that each plug has

two positive leads and two negative leads. Both positive and both

negative leads are wired together. The meter will read either Plus (+)

or Minus (-) 12VDC depending if the damper is to be Open or

Closed respectively.

DAMPER CLOSED

-12VDC

NOT USED

POSITIVE (+)

NEGATIVE (-)

MOTOR PLUG

VDC

-12VDC

NOT USED

POSITIVE (+)

NEGATIVE (-)

MOTOR PLUG

-12VDC-12VDC

NOT USED

POSITIVE (+)

NEGATIVE (-)

MOTOR PLUG

VDC

When using multiple dampers on a single zone, please note to have

no more than 6 dampers on a single zone. Adding dampers beyond

the recommended number may cause all dampers to be slow to

operate and may not fully cycle between open and closed.

DAMPER OPEN

+12VDC

NOT USED

POSITIVE (+)

NEGATIVE (-)

MOTOR PLUG

VDC

+12VDC

NOT USED

POSITIVE (+)

NEGATIVE (-)

MOTOR PLUG

+12VDC+12VDC

NOT USED

POSITIVE (+)

NEGATIVE (-)

MOTOR PLUG

VDC

PCMMP3 Wi

ring Diagram

693D-0311

Specifications and illustrations subject to change without

notice and without incurring obligations.

Printed in U.S.A. (03/11)

24V TRANS

T24 -24V 40VA

TRANSFORMER

Y COMPRESSOR RELAY

G FAN RELAY

W HEAT RELAY

R 24V. TRANSFORMER C

FURNACE CONTROLS

OUTDOOR CONDENSING UNIT

EQUIPMENT

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

Leaving Air Sensor

(Mounted in Supply Air before Zone Dampers)

Model ZPS

LAS Terminals

On Zone Panel

JUMPERS

FIPG – Fan On In Purge – Placing this jumper ON

keeps the Fan running during the two minute

Purge Mode. The jumper Off allows the furnace

controls to cycle the fan.

FIH – This jumper ON brings the Fan On with a

call for heat. When off the fan is brought on by the

furnace controls.

TEST – Used ONLY to test the panel as this

accelerates all of the timings.

LOW LIMIT – Sets Heating Limit at 170°F with

jumper ON and 180°F with jumper OFF.

BOOT Button– Resets the microprocessor.

NO SENSOR – Must be ON when not using

Leaving Air Sensor and OFF when sensor is

wired.

FIPG

FIH

TEST

BOOT

ON LOW LIMIT

24V TRANS

T24 -24V 40VA

TRANSFORMER

Y COMPRESSOR RELAY

G FAN RELAY

W HEAT RELAY

R 24V. TRANSFORMER C

FURNACE CONTROLS

OUTDOOR CONDENSING UNIT

EQUIPMENT

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

70°

ZONE THERMOSTAT

Leaving Air Sensor

(Mounted in Supply Air before Zone Dampers)

Model ZPS

LAS Terminals

On Zone Panel

JUMPERS

FIPG – Fan On In Purge – Placing this jumper ON

keeps the Fan running during the two minute

Purge Mode. The jumper Off allows the furnace

controls to cycle the fan.

FIH – This jumper ON brings the Fan On with a

call for heat. When off the fan is brought on by the

furnace controls.

TEST – Used ONLY to test the panel as this

accelerates all of the timings.

LOW LIMIT – Sets Heating Limit at 170°F with

jumper ON and 180°F with jumper OFF.

BOOT Button– Resets the microprocessor.

NO SENSOR – Must be ON when not using

Leaving Air Sensor and OFF when sensor is

wired.

FIPG

FIH

TEST

BOOT

ON LOW LIMIT

Broan PCMMP3 Zoning System Installation guide

Broan PCMMP3 Zoning System Installation guide

Broan PCMMP3 Zoning System Installation guide

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